Universal mills



Feb. 10,V 1970 ,1. SEVERIN ETAL UNIVERSAL MILLS Y Filed Jam.v 2o. 1967 3 Sheets-Sheet l1 Rolf K. Buneroh y Feb. 10, 1970 J, sEyEmN ETAL 3,494,166

` UNIVERSAL MILLS Fileduan. 2o. 1967 s sheets-sheet 2 INVENTORS i 'f' mnam un o M@ my ff# Feb. 10, 1970 J, SEVERIN ETAL 3,494,166

UNIVERSAL MILLS A l Filed Jan. 20. 1967 3v Sheets-Sheet 5 INVENTORS Jose Severin Fig. 5.

United States Patent O 3,494,166 UNIVERSAL MILLS Jose Severin, Mulheim (Ruhr)-Speldorf, Germany, and

Rolf K. Bungeroth, Pittsburgh, Pa., assignors to Kommanditgesellschaft Friedrich Kocks, Dusseldorf, Germany, a corporation of Germany Filed Jan. 20, 1967, Ser. No. 610,674 Int. Cl. BZlb 31/14 U.S. Cl. 72-239 7 Claims ABSTRACT OF THE DISCLOSURE A universal reducing mill is provided having several rolling stands arranged one after the other, each stand being mounted on a base, a frame enclosing each of the stands and the corresponding bases at least partially, a portion of said frame being mounted on a swivel'whereby said portion can lbe opened in one position for installing and removing the stands and corresponding bases as a unit and in a second position acts to clamp said stands and bases in operating position, roll Idrive means on the frame and supports fixed on said portion of the trarne receiving the rolling stands and bases and Qn which the stands and bases reside in both the swivelled out and swivelled in position of the frame.

This invention relates to universal mills and particularly to a tube reducing mill comprising several rolling stands each rotated relatively tolthe one preceding and arranged one after the other on astand supporting frame.

On such rolling mills, the rolling stock is rolled with a relatively high degree of elongation which is built up by the rolling mill thus causing the formation of the socalled thickened tube ends. To keep same as short as possible, the stands are closely spaced.

In general, the rolling stands are positioned in a frame supporting in general also the elements vfor driving the rolls and enclosing the rolling stands from three sides or even from all sides. In operating position, the rolling stands are therefore poorly accessible and changing of roll stands is diflicult.

Some measures are already suggested for facilitating stand changing. It is known, for example, in the case of stand frames which totally enclose the rolling stands to split the stand supporting frame and to swivel away the upper part like a cover. Another suggestion provides for enlarging the stand supporting frame open at one side t the open side and to push the stands horizontally out of the roll pass line.

Installations according to these suggestions are of some use for changing the stands. On the other hand, they do not perform satisfactorily, if, e.g., the rolling stock has been pushed together as in case of cobbles. In such cases it is desirable to remove the stands, which can noI more be moved one relatively to another, out of the roll pass line so that they are accessible from three sides, and the rolling stock can be cut out with cutting and burning torches.

The objective of the present invention is to keep by simple means as short as possible interruptions in the rolling caused by stand changing and by disturbances which cannot be totally avoided.

The invention is concerned with universal mills, especially tube reducing mills comprising several rolling stands each rotated as against the preceding and arranged one after the other on a stand supporting frame, whereby the frame encloses the stands totally or partly and is opened for installing and removing the stands and can carry the roll drives. The invention is characterized in that the hinged part of the trame is provided with supports for the 3,494,166 Patented Feb. 10, 1970 rolling stands carrying the stands both in the swivelled in and in the swivelled out position.

The invention is applicable independent of the number of the rolls forming a roll pass and of the type of the roll drive.

The stands are aligned on the swivelled out frame. The stands can be changed as easily as in comparable frames open at the top or at the side. All stands are easily brought into rolling position by swinging the stan-d supporting frame. In case foreign substances get between the stands in rolling position, they will be ordinarily swung out without being moved one against the other s-o that they are easily accessible from three sides and tools can be applied to remove the yforeign substances.

The invention is characterized in part by the fact that the rolling stand supports are provided on a support covering the whole mill, which can be removed eventually along with the installed stands from the swivelling part of the frame. Thus it is not only possible to change the individual stands, but to change also a whole set of stands.

The construction of a universal rolling mill according to the invention is explained with the aid of drawings in the case of an assembly comprising three individually driven rolls forming a pass.

FIGURE 1 shows the view of a universal mill in rolling direction seen with rolling stands in working position;

FIGURE 2 the same with swivelled out stands;

FIGURE 3 shows in plan view one form of .base for carrying the roll stands;

FIGURE 4 is an end elevation of the base of FIG- URE 3;

FIGURE 5 shows in plan view a multi-part base for carrying the roll stands; and

FIGURE 6 is an end elevation of the base of FIG- URE 5.

The numbers of the parts are the same in all drawings.

The stand supporting frame comprises a main frame made up of parts 1 and 2 and a swivel frame member 3 which can be swivelled around the axle 4. The swivelling motion is effected by rods engaging at the eyes 5 in the swivelling frame member 3. This may, for example, also be accomplished by a hydraulic piston and cylinder 5a. Each stand 6 comprises three rolls 7 forming a roll pass. The rolls 7 are driven through the couplings 8, 9 and 10. The couplings marked by a broken line belong to the subsequent rolling stand rotated by 60. The stands are carried by the pads 11 and 12 and are closely pressed in rolling position against the pad 13 and are aligned to the rolling axis. The coupling 8 is withdrawn for swivelling out the stands. A withdrawal of the couplings 9 and 10 is not necessary in case of the selected position of the swivelling axle 4. The base 14 can be solidly connected With the swivelling frame member 3 or can be made removable by any well-known quick connection so that the stands can be changed both individually and also in sets.

Moreover the base 14 can be made as a single unit as shown in FIGURES 1 and 2, as a single unit mounted on wheels 15 movable on rails 16 carried by the swivelling frame member 3, or it can be made up of several parts 14a, 14b and 14e as shown in FIGURES 5 and 6. Each base is held on a support 30 on the frame member 3 (FIGURES 1-4) or frame member 17 (FIGURES 5 and 6). In this embodiment each of the parts 14a, 14b and 14e` is mounted on a frame 17 which takes the place of frame 3. Frame 17 is provided with spaced axles 18 carrying wheels 19 on each end mounted for movement on rails 20 on swivelling frame 21. Each part may be locked to rails 20 by any conventional rail lock means. Rails 22 may be provided with the oor adjacent rails 21 to permit removal of frames 17 for rapid changes of rolls.

In the foregoing specification we have set out a preferred embodiment and practice of our invention, howi ever, it is to be understood that this invention may be Y otherwise embodied within the scope of the following claims.

We claim:

1. Universal reducing mill comprising several rolling stands each rotated as against the preceding and arranged one after the other, each stand being mounted on a base, a frame enclosing each of the stands and the corresponding bases at least partly, a portion of said frame carrying said base being mounted on a swivel whereby said portion can be opened in one position for installing and removing the stands and corresponding bases as a unit and in a second position acts to clamp said stands and bases in operating position, roll drive .means on the frame and supports xed on said portion of the frame receiving the rolling stands and bases and on which the stands and bases reside in both the swivelled out and swivelled in position of the said frame portion.

2. Universal reducing mill according to claim 1 characterized in that the rolling stand supports are provided on a base extending the length of the whole rolling mill,

Iwhich can be removed from the frame along with the installed stands and bases.

3. A universal tube reducing .mill comprising a main frame, a swivel frame member hinged on said main frame and movable toward and away from said frame, a roll stand on said swivel frame movable therewith into engagement with the main frame and clamped therein by said swivel frame member, a plurality of rolls in said roll stand, drive means on the main frame engaging said rolls lwhen the swivel frame is moved toward said main frame and disengaging from said rolls when the swivel frame is moved away from the main frame.

4. A universal mill as claimed in claim 3 wherein means are provided adjacent the main frame for moving the swivel frame from an open position away from the main frame to a closed position with the roll stand bearing on the main frame and clamped thereto by said swivel frame and means for moving the swivel frame.

5. A universal mill as claimed in claim 2 wherein the base is mounted on wheels .movable on rails on the swivel portion of the frame.

6. A universal mill as claimed in claim 5 wherein the rails on the swivel portion of the frame extend lengthwise thereof parallel to the swivel joint.

7. A universal mill as claimed in claim 5 wherein the rails on the swivel portion of the frame extend transverse to the swivel joint.

References Cited UNITED STATES PATENTS 2,120,539 6/1938 Barth 72-238 3,221,529 l2/l965 Chang 72-237 3,328,973 7/1967 Scheib 72-239 CHARLES W. LANHAM, Primary Examiner B. I. MUSTAIKIS, Assistant Examiner 

